The first one. But don't bet on it because I could be wrong.
Answer:
Sentence two, "If my friend calls, tell them I'm at my violin lesson."
Explanation:
"Friend" is singular. "Them" is third-person plural.
I am truly sorry if this is incorrect but... I believe it is due to the fact that Latin was popular and many people knew it and it was just overall considered a scientific language of sorts.
Rainsford realizes that the general is toying with him when he turns back and he decides he will need to up his game and not lose his nerve
